"Shut up," she gasps, pressing up against his hand. Under the carapace, the actual anatomy doesn't seem to have changed much; still warm and wet and human, still clenching delightfully at his touch. Susan moans, running the tip of one claw gently along the line where fin meets skin, and kisses him as hard as she can.

There's a time for patient exploration of each others' bodies, and this isn't it. She's already guiding his cock between her legs, her intentions clear.